/SCHEDULE=SIZE (default)
       /SCHEDULE=NOSIZE

    Specifies whether pending jobs in an output execution queue are
    scheduled for printing based on the size of the job. When the
    default qualifier /SCHEDULE=SIZE is in effect, shorter jobs print
    before longer ones.

    When the /SCHEDULE=NOSIZE qualifier is in effect, jobs are not
    scheduled according to size.

    If you enter this command while there are pending jobs in any
    queue, its effect on future jobs is unpredictable.